Image capturing optical lens system

ABSTRACT

This invention provides an image capturing optical lens system in order from an object side to an image side comprising: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with negative refractive power having at least one of the object-side and image-side surfaces thereof being aspheric; a fourth lens element having at least one of the object-side and image-side surfaces thereof being aspheric; a fifth lens element having a concave image-side surface, both the object-side and image-side surfaces thereof being aspheric, at least one inflection point is formed on at least one of the object-side surface and the image-side surface thereof, and the fifth lens element is made of plastic. By such arrangement, photosensitivity and total track length of the system can be reduced, and the aberration and astigmatism of the system can be effectively corrected. Moreover, high image resolution can be obtained.

CROSS-REFERENCE TO RELATED APPLICATIONS

This non-provisional application claims priority under 35 U.S.C. §119(a)on Patent Application No. 100116513 filed in Taiwan, R.O.C. on May 11,2011, the entire contents of which are hereby incorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an image capturing optical lens system,and more particularly, to a compact image capturing optical lens systemused in electronic products.

2. Description of the Prior Art

In recent years, with the popularity of portable electronic productshaving photographing function, the demand of compact imaging lens systemhas grown. Generally, the sensor of a general photographing camera isnone other than CCD (Charge Coupled Device) or CMOS device(Complementary Metal Oxide Semiconductor device). Furthermore, advancesin semiconductor manufacturing technology have allowed the pixel size ofsensors to be reduced and therefore lead compact imaging lens systems tohigher resolution. In the meantime, the demand for better image qualityis also increased.

A conventional image capturing lens system equipped on a portableelectronic product is in various design of two-lens element, three-lenselement, four-lens element or five-lens element, such as the one setforth in U.S. Pat. No. 7,365,920. However, with the popularity of highlevel portable electronic products, such as smart phone and PDA(Personal Digital Assistant), the demand for the pixel size and imagequality of compact imaging lens system increase fast, and theconventional lens system with four lens elements can no longer satisfythe imaging lens systems of even higher level. Moreover, a conventionalimage capturing lens system having five lens elements usually adopts anassembly different in positive or negative refractive power or acemented doublet lens element. This kind of five-lens element lenssystem frequently has the drawback of excessively long total tracklength so that is not suitable for compact electronic products

Inasmuch as the foregoing, a need is continuously existed for a lenssystem with good image quality and moderate total track length and issuitable for applying for compact and portable electronic products.

SUMMARY OF THE INVENTION

The present invention provides an image capturing optical lens systemcomprising, in order from an object side to an image side: a first lenselement with positive refractive power having a convex object-sidesurface; a second lens element with negative refractive power; a thirdlens element with negative refractive power having at least one of theobject-side and image-side surfaces thereof being aspheric; a fourthlens element having at least one of the object-side and image-sidesurfaces thereof being aspheric; and a fifth lens element having aconcave image-side surface, both the object-side and image-side surfacesthereof being aspheric, at least one inflection point is formed on atleast one of the object-side and image-side surfaces thereof, and thefifth lens element is made of plastic; wherein a curvature radius of theobject-side surface of the fourth lens element is R7, a curvature radiusof the image-side surface of the fourth lens element is R8, a focallength of the second lens element is f2, a focal length of the thirdlens element is f3, a focal length of the image capturing optical lenssystem is f, and they satisfy the following relations: 4.0<|R7/R8|;0.8<f2/f3<10.0; and −2.0<f3/f<−0.67.

By such arrangement, photosensitivity and total track length of thesystem can be reduced, and the aberration and astigmatism of the systemcan be effectively corrected. Moreover, high image resolution can beobtained.

In the aforementioned image capturing optical lens system, the firstlens element has positive refractive power and thereby can providerefractive power needed for the system and is favorable for reducing thetotal track length thereof. When the second lens element has negativerefractive power, the aberration provided by the first lens element canbe effectively corrected. When the third lens element has negativerefractive power, it can cooperate with the second lens element forcorrecting the aberration; meanwhile, the fourth lens element canprovide the positive refractive power needed for the system to reducethe error sensitivity thereof. When the fourth lens element has positiverefractive power and the fifth lens element has negative refractivepower, a positive-negative telephoto structure is formed so that theback focal length of the system is favorably reduced for shortening thetotal track length of the system.

In the aforementioned image capturing optical lens system, the firstlens element can be a bi-convex lens element or a meniscus lens elementhaving a convex object-side surface and a concave image-side surface.When the first lens element is a bi-convex lens element, the refractivepower of the first lens element can be strengthened for reducing thetotal track length of the system. When the first lens element is aconvex-concave meniscus lens element, it is favorable for correcting theastigmatism of the system. When the second lens element has a concaveimage-side surface, the negative refractive power of the second lenselement can be effectively strengthened for obtaining better aberrationcorrection ability. When the third lens element has a concaveobject-side surface, it is favorable for correcting the astigmatism ofthe system. When the fourth lens element has a convex image-sidesurface, the positive refractive power of the fourth lens element can beeffectively strengthened and the error sensitivity of the system can bereduced. When the fifth lens element has a concave object-side surface,the negative refractive power of the fifth lens element can be properlyadjusted to cooperate with the fourth lens element for obtaining thetelephoto effect. When the fifth lens element has a concave image-sidesurface, the principal point of the system can be positioned away fromthe image plane, and the back focal length of the system can be reducedfor favorably shortening the total track length thereof and keeping thesystem compact. Furthermore, when at least one inflection is formed onthe fifth lens element, the angle at which light projects onto the imagesensor from the off-axis field can be effectively reduced so that thesensing efficiency of the image sensor can be improved and the off-axisaberration can be corrected. Proper adjustment of the ratio between thefocal length of the third lens element and the focal length of the imagecapturing optical lens system or the focal length of the second lenselement can make the second and the third lens elements, which havenegative refractive power, obtain better aberration correction ability.Also, arranging the ratio of the radii of the curvature of theobject-side and image-side surfaces of the fourth lens element inspecific range can make the refractive power thereof even more properfor favorably reducing the error sensitivity of the system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A shows an image capturing optical lens system in accordance witha first embodiment of the present invention.

FIG. 1B shows the aberration curves of the first embodiment of thepresent invention.

FIG. 2A shows an image capturing optical lens system in accordance witha second embodiment of the present invention.

FIG. 2B shows the aberration curves of the second embodiment of thepresent invention.

FIG. 3A shows an image capturing optical lens system in accordance witha third embodiment of the present invention.

FIG. 3B shows the aberration curves of the third embodiment of thepresent invention.

FIG. 4A shows an image capturing optical lens system in accordance witha fourth embodiment of the present invention.

FIG. 4B shows the aberration curves of the fourth embodiment of thepresent invention.

FIG. 5A shows an image capturing optical lens system in accordance witha fifth embodiment of the present invention.

FIG. 5B shows the aberration curves of the fifth embodiment of thepresent invention.

FIG. 6A shows an image capturing optical lens system in accordance witha sixth embodiment of the present invention.

FIG. 6B shows the aberration curves of the sixth embodiment of thepresent invention.

FIG. 7A shows an image capturing optical lens system in accordance witha seventh embodiment of the present invention.

FIG. 7B shows the aberration curves of the seventh embodiment of thepresent invention.

FIG. 8A shows an image capturing optical lens system in accordance withan eighth embodiment of the present invention.

FIG. 8B shows the aberration curves of the eighth embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention provides an image capturing optical lens systemcomprising, in order from an object side to an image side: a first lenselement with positive refractive power having a convex object-sidesurface; a second lens element with negative refractive power; a thirdlens element with negative refractive power having at least one of theobject-side and image-side surfaces thereof being aspheric; a fourthlens element having at least one of the object-side and image-sidesurfaces thereof being aspheric; and a fifth lens element having aconcave image-side surface, both the object-side and image-side surfacesthereof being aspheric, at least one inflection point is formed on atleast one of the object-side and image-side surfaces thereof, and thefifth lens element is made of plastic; wherein a curvature radius of theobject-side surface of the fourth lens element is R7, a curvature radiusof the image-side surface of the fourth lens element is R8, a focallength of the second lens element is f2, a focal length of the thirdlens element is f3, a focal length of the image capturing optical lenssystem is f, and they satisfy the following relations: 4.0<|R7/R8|;0.8<f2/f3<10.0; and −2.0<f3/f<−0.67.

When the relation of 4.0<|R7/R8| is satisfied, the positive refractivepower of the fourth lens element is more suitable for not only reducingthe error sensitivity of the system but also facilitating themanufacture thereof; preferably, the following relation is satisfied:7.0<|R7/R8|.

When the relation of 0.8<f2/f3<10.0 is satisfied, the distribution ofthe negative refractive power of the second and the third lens elementsis more proper, and thereby the aberration of the system can befavorably corrected; preferably, the following relation is satisfied:1.2<f2/f3<4.5.

When the relation of −2.0<f3/f<−0.67 is satisfied, the refractive powerof the third lens element is more suitable for favorably correcting theaberration of the system; preferably, the following relation issatisfied: −1.7<f3/f<−0.8.

In the aforementioned image capturing optical lens system, a curvatureradius of the object-side surface of the first lens element is R1, acurvature radius of the image-side surface of the first lens element isR2, and they preferably satisfy the following relation: −0.8<R1/R2<0.8.When the above relation is satisfied, the spherical aberration can befavorably corrected and the positive refractive power of the first lenselement can be properly adjusted; more preferably, the followingrelation is satisfied: −0.3<R1/R2<0.2.

In the aforementioned image capturing optical lens system, a focallength of the fourth lens element is f4, a focal length of the fifthlens element is f5, a focal length of the second lens element is f2, afocal length of the third lens element is f3, and they preferablysatisfy the following relation: 0.05<(|f4|+|f5|)/(|f2|+|f3|)<0.5. Whenthe above relation is satisfied, the refractive power of the second lenselement can cooperate with the refractive power of the third lenselement for effectively correcting the aberration of the system;moreover, the arrangement of the positive and negative refractive powerof the fourth lens element and the fifth lens element respectively canobtain a better telephoto effect so that the back focal length of thesystem can be reduced favorably; more preferably, the following relationis satisfied: 0.1<(|f4|+|f5|)/(|f2|+|f3|)<0.3.

In the aforementioned image capturing optical lens system, a curvatureradius of the object-side surface of the second lens element is R3, acurvature radius of the image-side surface of the second lens element isR4, and they preferably satisfy the following relation: |R3|>|R4|. Whenthe above relation is satisfied, the curvature of the second lenselement is more suitable so that a better aberration correction effectcan be obtained.

In the aforementioned image capturing optical lens system, a curvatureradius of the object-side surface of the third lens element is R5, acurvature radius of the image-side surface of the third lens element isR6, and they preferably satisfy the following relation: |R5|<|R6|. Whenthe above relation is satisfied, the curvature of the third lens elementis more suitable to cooperate with the second lens element foraberration correction.

In the aforementioned image capturing optical lens system, an axialdistance between the first lens element and the second lens element isT12, an axial distance between the third lens element and the fourthlens element is T34, an axial distance between the second lens elementand the third lens element is T23, and they preferably satisfy thefollowing relation: 0.1<(T12+T34)/T23 <0.5. When the above relation issatisfied, the interval between the lens elements in the system is moresuitable, which is favorable for not only the arrangement and assemblyof the lens elements but also the organization of the space in thesystem for keeping the system compact.

In the aforementioned image capturing optical lens system, an Abbenumber of the first lens element is V1, an Abbe number of the secondlens element is V2, an Abbe number of the third lens element is V3, andthey preferably satisfy the following relation: (V2+V3)/V1<1.0. When theabove relation is satisfied, the chromatic aberration of the system canbe adjusted and corrected favorably.

In the aforementioned image capturing optical lens system, the curvatureradius of the image-side surface of the fourth lens element is R8, acurvature radius of the image-side surface of the fifth lens element isR10, and they preferably satisfy the following relation:−1.0<R8/R10<−0.5. When the above relation is satisfied, the curvature ofthe fourth and the fifth lens element is more suitable for obtaining apositive-negative telephoto effect, and thereby the back focal length ofthe system can be reduced for shortening the total track length thereoffavorably.

In the aforementioned image capturing optical lens system, the focallength of the image capturing optical lens system is f, the focal lengthof the fourth lens element is f4, and they preferably satisfy thefollowing relation: f/f4>2.0. When the above relation is satisfied, therefractive power of the fourth lens element is more suitable forfavorably reducing the error sensitivity of the system and facilitatingthe manufacture thereof.

In the aforementioned image capturing optical lens system, the focallength of the image capturing optical lens system is f, the focal lengthof the fifth lens element is f5, and they preferably satisfy thefollowing relation: f/f5<−2.0. When the above relation is satisfied, thefifth lens element is complementary to balance with the refractive powerof the fourth lens element, and thereby the back focal length of thesystem is reduced for shortening the total track length thereof.

In the aforementioned image capturing optical lens system, the systemfurther comprises a stop, an axial distance between the stop and theimage-side surface of the fifth lens element is Sd, an axial distancebetween the object-side surface of the first lens element and theimage-side surface of the fifth lens element is Td, and they preferablysatisfy the following relation: 0.75<Sd/Td<1.1. When the above relationis satisfied, it is favorable for obtaining a better balance between theproperties of telecentric and wide field of view.

In the aforementioned image capturing optical lens system, a centralthickness of the second lens element is CT2, a central thickness of thethird lens element is CT3, and they preferably satisfy the followingrelation: 0.7<CT2/CT3<1.3. When the above relation is satisfied, thethickness of each lens element in the system is more suitable, which isnot only favorable for the manufacture and assembly of the lens elementsbut also for obtaining a moderate total track length of the system.

In the aforementioned image capturing optical lens system, the systemfurther comprises an image sensor provided on an image plane, half of adiagonal length of an effective photosensitive area of the image sensoris ImgH, the focal length of the image capturing optical lens system isf, and they preferably satisfy the following relation: tan⁻¹(ImgH/f)>34.When the above relation is satisfied, a sufficient field of view can befavorably provided.

In the aforementioned image capturing optical lens system, an axialdistance between the object-side surface of the first lens element andthe image plane is TTL, half of a diagonal length of an effectivephotosensitive area of the image sensor is ImgH, and they preferablysatisfy the following relation: TTL/ImgH<2.0. When the above relation issatisfied, it is favorable for keeping the system compact in order to beequipped on portable electronic products.

In the aforementioned image capturing optical lens system, the lenselements can be made of glass or plastic material. If the lens elementsare made of glass, the freedom for distributing the refractive power ofthe image capturing optical lens system can be increased. If plasticmaterial is adopted to produce the lens elements, the production costwill be reduced effectively. Additionally, the surfaces of the lenselements can be aspheric and easily made into non-spherical profiles,allowing more design parameter freedom which can be used to reduceaberrations and the number of the lens elements used in an opticalsystem. Consequently, the total track length of the image capturingoptical lens system can be effectively reduced.

In the present image capturing optical lens system, if a lens elementhas a convex surface, it means the portion of the surface in proximityto the optical axis is convex; if a lens element has a concave surface,it means the portion of the surface in proximity to the optical axis isconcave.

In the present image capturing optical lens system, there can be atleast one stop, such as a glare stop or a field stop, provided foreliminating stray light and thereby promoting image resolution thereof.

Preferred embodiments of the present invention will be described in thefollowing paragraphs by referring to the accompanying drawings.

Embodiment 1

FIG. 1A shows an image capturing optical lens system in accordance withthe first embodiment of the present invention, and FIG. 1B shows theaberration curves of the first embodiment of the present invention. Theimage capturing optical lens system of the first embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a first lens element 110 made of plastic with positive refractive powerhaving a convex object-side surface 111 and a convex image-side surface112, the object-side and image-side surfaces 111 and 112 thereof beingaspheric;

a second lens element 120 made of plastic with negative refractive powerhaving a convex object-side surface 121 and a concave image-side surface122, the object-side and image-side surfaces 121 and 122 thereof beingaspheric;

a third lens element 130 made of plastic with negative refractive powerhaving a concave object-side surface 131 and a convex image-side surface132, the object-side and image-side surfaces 131 and 132 thereof beingaspheric;

a fourth lens element 140 made of plastic with positive refractive powerhaving a concave object-side surface 141 and a convex image-side surface142, the object-side and image-side surfaces 141 and 142 thereof beingaspheric; and

a fifth lens element 150 made of plastic with negative refractive powerhaving a concave object-side surface 151 and a concave image-sidesurface 152, the object-side and image-side surfaces 151 and 152 thereofbeing aspheric, and at least one inflection point is formed on theimage-side surface 152 thereof;

wherein an aperture stop 100 is disposed between the first lens element110 and the second lens element 120;

the image capturing optical lens system further comprises an IR filter160 disposed between the image-side surface 152 of the fifth lenselement 150 and an image plane 171, and the IR filter 160 is made ofglass and has no influence on the focal length of the image capturingoptical lens system; the image capturing optical lens system furthercomprises an image sensor 170 provided on the image plane 171.

The detailed optical data of the first embodiment is shown in TABLE 1,and the aspheric surface data is shown in TABLE 2, wherein the units ofthe radius of curvature, the thickness and the focal length areexpressed in mm, and HFOV is half of the maximal field of view.

TABLE 1 (Embodiment 1) f = 3.00 mm, Fno = 2.28, HFOV = 37.4 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # length 0Object Plano Infinity 1 Lens 1    1.370860 (ASP) 0.461 Plastic 1.54455.9 2.45 2 −42.316000 (ASP) 0.002 3 Ape. Stop Plano 0.028 4 Lens 2  55.511500 (ASP) 0.230 Plastic 1.640 23.3 −10.71 5    6.089700 (ASP)0.416 6 Lens 3  −2.044980 (ASP) 0.257 Plastic 1.640 23.3 −4.01 7−10.548300 (ASP) 0.048 8 Lens 4  −5.277500 (ASP) 0.719 Plastic 1.54455.9 1.18 9  −0.600800 (ASP) 0.153 10 Lens 5  −2.653050 (ASP) 0.372Plastic 1.535 56.3 −1.28 11    0.972140 (ASP) 0.500 12 IR-filter Plano0.210 Glass 1.517 64.2 — 13 Plano 0.482 14 Image Plano — * Referencewavelength is d-line 587.6 nm

TABLE 2 Aspheric Coefficients Surface # 1 2 4 5 6 k = −6.84330E+00−9.90000E+01 9.90000E+01 4.52277E+01 6.27428E+00 A4 = 2.83655E−01−4.82434E−01 −3.63746E−01 2.47545E−03 −2.43249E−01 A6 = −4.64186E−011.37888E+00 2.02144E+00 8.80386E−02 −6.34867E−01 A8 = 2.14773E−01−2.51317E+00 −3.80292E+00 1.06160E+00 4.43834E−01 A10 = −8.78783E−022.51184E+00 3.96236E+00 −2.97885E+00 2.81205E+00 A12 = −8.94184E−01−1.96875E+00 1.41467E+00 3.43937E+00 −1.91108E+00 A14 = 1.03756E+001.49388E+00 −4.51671E+00 −1.14527E+00 −6.67705E−03 A16 = −5.98275E−033.60791E−08 3.08911E−08 3.18903E−08 Surface # 7 8 9 10 11 k =−5.00000E+01 −1.55945E+01 −2.89589E+00 0.00000E+00 −9.94146E+00 A4 =−4.20534E−01 −4.70621E−01 −3.91458E−01 3.72311E−03 −1.60432E−01 A6 =3.75802E−01 1.04475E+00 4.68810E−01 −4.28023E−04 1.19515E−01 A8 =−5.53883E−01 −1.21106E+00 −4.02764E−01 3.28592E−02 −7.08371E−02 A10 =1.06677E+00 1.09751E+00 4.27445E−01 −4.51650E−02 2.58514E−02 A12 =−5.57289E−01 −6.77397E−01 −2.17134E−01 2.98118E−02 −5.33950E−03 A14 =−1.09920E−02 2.26782E−01 3.00043E−02 −9.74469E−03 4.69273E−04 A16 =−4.43605E−02 7.54561E−04 1.29684E−03

The equation of the aspheric surface profiles is expressed as follows:

${X(Y)} = {{( {Y^{2}/R} )/( {1 + {{sqrt}( {1 - {( {1 + k} )*( {Y/R} )^{2}}} )}} )} + {\sum\limits_{i}{({Ai})*( Y^{i} )}}}$

wherein:

X: the height of a point on the aspheric surface at a distance Y fromthe optical axis relative to the tangential plane at the asphericsurface vertex;

Y: the distance from the point on the curve of the aspheric surface tothe optical axis;

k: the conic coefficient;

Ai: the aspheric coefficient of order i.

In the first embodiment of the present image capturing optical lenssystem, the focal length of the image capturing optical lens system isf, and it satisfies the following relation: f=3.00 (mm).

In the first embodiment of the present image capturing optical lenssystem, the f-number of the image capturing optical lens system is Fno,and it satisfies the relation: Fno=2.28.

In the first embodiment of the present image capturing optical lenssystem, half of the maximal field of view of the image capturing opticallens system is HFOV, and it satisfies the relation: HFOV=37.4 deg.

In the first embodiment of the present image capturing optical lenssystem, an Abbe number of the second lens element 120 is V2, an Abbenumber of the third lens element 130 is V3, an Abbe number of the firstlens element 110 is V1, and they satisfy the following relation:(V2+V3)/V1=0.83.

In the first embodiment of the present image capturing optical lenssystem, an axial distance on the optical axis between the image-sidesurface 112 of the first lens element 110 and the object-side surface121 of the second lens element 120 is T12, an axial distance on theoptical axis between the image-side surface 132 of the third lenselement 130 and the object-side surface 141 of the fourth lens element140 is T34, an axial distance on the optical axis between the image-sidesurface 122 of the second lens element 120 and the object-side surface131 of the third lens element 130 is T23, and they preferably satisfythe following relation: (T12+T34)/T23=0.19.

In the first embodiment of the present image capturing optical lenssystem, a central thickness of the second lens element 120 is CT2, acentral thickness of the third lens element 130 is CT3, and they satisfythe relation: CT2/CT3=0.89.

In the first embodiment of the present image capturing optical lenssystem, a curvature radius of the object-side surface 111 of the firstlens element 110 is R1, a curvature radius of the image-side surface 112of the first lens element 110 is R2, and they satisfy the relation:R1/R2=−0.03.

In the first embodiment of the present image capturing optical lenssystem, a curvature radius of the object-side surface 141 of the fourthlens element 140 is R7, a curvature radius of the image-side surface 142of the fourth lens element 140 is R8, and they satisfy the relation:|R7/R8|=8.78.

In the first embodiment of the present image capturing optical lenssystem, the curvature radius of the image-side surface 142 of the fourthlens element 140 is R8, a curvature radius of the image-side surface 152of the fifth lens element 150 is R10, and they satisfy the followingrelation: R8/R10=−0.62.

In the first embodiment of the present image capturing optical lenssystem, a focal length of the third lens element 130 is f3, a focallength of the image capturing optical lens system is f, and they satisfythe following relation: f3/f=−1.34.

In the first embodiment of the present image capturing optical lenssystem, a focal length of the second lens element 120 is f2, a focallength of the third lens element 130 is f3, and they satisfy thefollowing relation: f2/f3=2.67.

In the first embodiment of the present image capturing optical lenssystem, a focal length of the image capturing optical lens system is f,a focal length of the fourth lens element 140 is f4, and they satisfythe following relation: f/f4=2.53.

In the first embodiment of the present image capturing optical lenssystem, a focal length of the image capturing optical lens system is f,a focal length of the fifth lens element 150 is f5, and they satisfy thefollowing relation: f/f5=−2.33.

In the first embodiment of the present image capturing optical lenssystem, a focal length of the fourth lens element 140 is f4, a focallength of the fifth lens element 150 is f5, a focal length of the secondlens element 120 is f2, a focal length of the third lens element 130 isf3, and they satisfy the following relation:(|f4|+|f5|)/(|f2|+|f3|)=0.17.

In the first embodiment of the present image capturing optical lenssystem, half of a diagonal length of an effective photosensitive area ofthe image sensor 170 is ImgH, the focal length of the image capturingoptical lens system is f, and they satisfy the following relation:tan⁻¹(ImgH/f)=37.30.

In the first embodiment of the present image capturing optical lenssystem, an axial distance between the aperture stop 100 and theimage-side surface 152 of the fifth lens element 150 is Sd, an axialdistance between the object-side surface 111 of the first lens element110 and the image-side surface 152 of the fifth lens element 150 is Td,and they satisfy the following relation: Sd/Td=0.83.

In the first embodiment of the present image capturing optical lenssystem, an axial distance between the object-side surface 111 of thefirst lens element 110 and the image plane 171 is TTL, half of adiagonal length of an effective photosensitive area of the image sensor170 is ImgH, and they satisfy the following relation: TTL/ImgH=1.67.

Embodiment 2

FIG. 2A shows an image capturing optical lens system in accordance withthe second embodiment of the present invention, and FIG. 2B shows theaberration curves of the second embodiment of the present invention. Theimage capturing optical lens system of the second embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a first lens element 210 made of plastic with positive refractive powerhaving a convex object-side surface 211 and a convex image-side surface212, the object-side and image-side surfaces 211 and 212 thereof beingaspheric;

a second lens element 220 made of plastic with negative refractive powerhaving a convex object-side surface 221 and a concave image-side surface222, the object-side and image-side surfaces 221 and 222 thereof beingaspheric;

a third lens element 230 made of plastic with negative refractive powerhaving a concave object-side surface 231 and a concave image-sidesurface 232, the object-side and image-side surfaces 231 and 232 thereofbeing aspheric;

a fourth lens element 240 made of plastic with positive refractive powerhaving a concave object-side surface 241 and a convex image-side surface242, the object-side and image-side surfaces 241 and 242 thereof beingaspheric; and

a fifth lens element 250 made of plastic with negative refractive powerhaving a concave object-side surface 251 and a concave image-sidesurface 252, the object-side and image-side surfaces 251 and 252 thereofbeing aspheric, and at least one inflection point is formed on theimage-side surface 252 thereof;

wherein an aperture stop 200 is disposed between the first lens element210 and the second lens element 220;

the image capturing optical lens system further comprises an IR filter260 disposed between the image-side surface 252 of the fifth lenselement 250 and an image plane 271, and the IR filter 260 is made ofglass and has no influence on the focal length of the image capturingoptical lens system; the image capturing optical lens system furthercomprises an image sensor 270 provided on the image plane 271.

The detailed optical data of the second embodiment is shown in TABLE 3,and the aspheric surface data is shown in TABLE 4, wherein the units ofthe radius of curvature, the thickness and the focal length areexpressed in mm, and HFOV is half of the maximal field of view.

TABLE 3 (Embodiment 2) f = 2.98 mm, Fno = 2.28, HFOV = 37.4 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # length 0Object Plano Infinity 1 Lens 1 1.488160 (ASP) 0.464 Plastic 1.544 55.92.46 2 −11.737100 (ASP)    −0.003 3 Ape. Stop Plano 0.043 4 Lens 2100.000000 (ASP)  0.250 Plastic 1.634 23.8 −7.91 5 4.773300 (ASP) 0.3476 Lens 3 −7.345100 (ASP)   0.260 Plastic 1.634 23.8 −4.96 7 5.584400(ASP) 0.119 8 Lens 4 −4.753500 (ASP)   0.717 Plastic 1.544 55.9 1.25 9−0.624710 (ASP)   0.228 10 Lens 5 −3.516400 (ASP)   0.280 Plastic 1.54455.9 −1.32 11 0.929150 (ASP) 0.500 12 IR-filter Plano 0.210 Glass 1.51764.2 — 13 Plano 0.462 14 Image Plano — * Reference wavelength is d-line587.6 nm

TABLE 4 Aspheric Coefficients Surface # 1 2 4 5 6 k = −1.28358E+019.90000E+01 −9.90000E+01 −1.79663E+00 3.24760E+01 A4 = 3.96180E−01−4.58729E−01 −4.94364E−01 −2.15180E−01 −6.69916E−01 A6 = −7.74711E−011.58097E+00 2.43974E+00 6.93206E−01 −4.94982E−03 A8 = 7.10962E−01−3.12469E+00 −4.82449E+00 −3.85470E−01 −1.73169E−01 A10 = −2.87028E−013.26869E+00 4.94838E+00 −1.12837E+00 2.88291E+00 A12 = −8.96631E−01−1.96875E+00 1.41467E+00 3.43937E+00 −1.90503E+00 A14 = 1.05298E+001.49388E+00 −4.51671E+00 −1.14527E+00 −6.67710E−03 A16 = −5.98276E−038.03932E−09 2.88069E−09 3.22775E−09 Surface # 7 8 9 10 11 k =−3.89145E+01 −5.40120E+01 −2.81788E+00 0.00000E+00 −8.82541E+00 A4 =−5.50585E−01 −3.33900E−01 −3.16718E−01 −5.61100E−02 −1.77300E−01 A6 =6.50135E−01 8.89009E−01 4.06687E−01 −1.78692E−03 1.23613E−01 A8 =−7.48054E−01 −1.22266E+00 −3.89371E−01 3.29201E−02 −7.24353E−02 A10 =9.43783E−01 1.16302E+00 4.44792E−01 −4.31605E−02 2.61032E−02 A12 =−3.99774E−01 −6.88640E−01 −2.25636E−01 3.06650E−02 −5.29966E−03 A14 =−5.53017E−03 1.95674E−01 1.73708E−02 −9.81950E−03 4.57949E−04 A16 =−1.76978E−02 9.40196E−03 1.15431E−03

The equation of the aspheric surface profiles of the second embodimenthas the same form as that of the first embodiment. Moreover, thedescription of the factors in the relations is as those set forth in thefirst embodiment, but the values of the relations of the secondembodiment are listed in the following TABLE 5.

TABLE 5 (Embodiment 2) f 2.98 f3/f −1.67 Fno 2.28 f2/f3 1.59 HFOV 37.4f/f4 2.39 (V2 + V3)/V1 0.85 f/f5 −2.26 (T12 + T34)/T23 0.46 (|f4| +|f5|)/(|f2| + |f3|) 0.20 CT2/CT3 0.96 tan⁻¹(ImgH/f) 37.48 R1/R2 −0.13Sd/Td 0.83 |R7/R8| 7.61 TTL/ImgH 1.67 R8/R10 −0.67

Embodiment 3

FIG. 3A shows an image capturing optical lens system in accordance withthe third embodiment of the present invention, and FIG. 3B shows theaberration curves of the third embodiment of the present invention. Theimage capturing optical lens system of the third embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a first lens element 310 made of plastic with positive refractive powerhaving a convex object-side surface 311 and a convex image-side surface312, the object-side and image-side surfaces 311 and 312 thereof beingaspheric;

a second lens element 320 made of plastic with negative refractive powerhaving a concave object-side surface 321 and a convex image-side surface322, the object-side and image-side surfaces 321 and 322 thereof beingaspheric;

a third lens element 330 made of plastic with negative refractive powerhaving a concave object-side surface 331 and a concave image-sidesurface 332, the object-side and image-side surfaces 331 and 332 thereofbeing aspheric;

a fourth lens element 340 made of plastic with positive refractive powerhaving a concave object-side surface 341 and a convex image-side surface342, the object-side and image-side surfaces 341 and 342 thereof beingaspheric; and

a fifth lens element 350 made of plastic with negative refractive powerhaving a convex object-side surface 351 and a concave image-side surface352, the object-side and image-side surfaces 351 and 352 thereof beingaspheric, and at least one inflection point is formed on both theobject-side surface 351 and the image-side surface 352 thereof;

wherein an aperture stop 300 is disposed between the first lens element310 and the second lens element 320;

the image capturing optical lens system further comprises an IR filter360 disposed between the image-side surface 352 of the fifth lenselement 350 and an image plane 371, and the IR filter 360 is made ofglass and has no influence on the focal length of the image capturingoptical lens system; the image capturing optical lens system furthercomprises an image sensor 370 provided on the image plane 371.

The detailed optical data of the third embodiment is shown in TABLE 6,and the aspheric surface data is shown in TABLE 7, wherein the units ofthe radius of curvature, the thickness and the focal length areexpressed in mm, and HFOV is half of the maximal field of view.

TABLE 6 (Embodiment 3) f = 3.29 mm, Fno = 2.80, HFOV = 34.2 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # length 0Object Plano Infinity 1 Lens 1   1.751260 (ASP) 0.407 Plastic 1.544 55.92.59 2 −6.660300 (ASP) −0.033 3 Ape. Stop Plano 0.133 4 Lens 2 −5.519800(ASP) 0.280 Plastic 1.634 23.8 −10.62 5 −31.250000 (ASP)  0.503 6 Lens 3−2.102700 (ASP) 0.252 Plastic 1.607 26.6 −2.97 7 13.106800 (ASP) 0.130 8Lens 4 −6.936700 (ASP) 0.718 Plastic 1.544 55.9 1.08 9 −0.562300 (ASP)0.080 10 Lens 5   8.333300 (ASP) 0.291 Plastic 1.544 55.9 −1.34 11  0.661970 (ASP) 0.550 12 IR-filter Plano 0.210 Glass 1.517 64.2 — 13Plano 0.825 14 Image Plano — * Reference wavelength is d-line 587.6 nm

TABLE 7 Aspheric Coefficients Surface # 1 2 4 5 6 k = −1.19058E+01−4.90000E+01 −3.63390E+01 −3.85069E+01 3.70336E+00 A4 = 1.76296E−01−4.00600E−01 −3.38598E−01 −9.07143E−02 −4.77148E−01 A6 = −4.97147E−017.10267E−01 1.60107E+00 4.06456E−01 −2.02311E−01 A8 = 3.36502E−01−1.65334E+00 −3.33248E+00 4.99846E−01 1.04828E+00 A10 = −4.50765E−011.98721E+00 3.81276E+00 −2.50655E+00 1.20936E+00 A12 = −8.94101E−01−1.97396E+00 1.41467E+00 3.44439E+00 −1.91051E+00 A14 = 1.04242E+001.49388E+00 −4.51671E+00 −1.14527E+00 −6.67573E−03 A16 = −2.15777E−021.02215E−06 9.95514E−07 9.95953E−07 Surface # 7 8 9 10 11 k =−2.92927E+01 −9.78407E+00 −3.36436E+00 0.00000E+00 −6.16085E+00 A4 =−6.43523E−01 −5.09732E−01 −3.89047E−01 −4.94928E−02 −1.45204E−01 A6 =6.94360E−01 9.92757E−01 5.04368E−01 −1.94479E−03 1.09582E−01 A8 =−6.88203E−01 −1.18008E+00 −4.28210E−01 3.24772E−02 −6.77638E−02 A10 =8.83642E−01 1.11558E+00 4.09006E−01 −4.32102E−02 2.60765E−02 A12 =−4.49658E−01 −7.03563E−01 −2.23287E−01 2.96461E−02 −5.44936E−03 A14 =1.95708E−02 2.29774E−01 3.42697E−02 −1.00899E−02 4.50929E−04 A16 =−2.97738E−02 5.01789E−03 1.30658E−03

The equation of the aspheric surface profiles of the third embodimenthas the same form as that of the first embodiment. Moreover, thedescription of the factors in the relations is as those set forth in thefirst embodiment, but the values of the relations of the thirdembodiment are listed in the following TABLE 8.

TABLE 8 (Embodiment 3) f 3.29 f3/f −0.90 Fno 2.80 f2/f3 3.58 HFOV 34.2f/f4 3.04 (V2 + V3)/V1 0.90 f/f5 −2.46 (T12 + T34)/T23 0.46 (|f4| +|f5|)/(|f2| + |f3|) 0.18 CT2/CT3 1.11 tan⁻¹(ImgH/f) 34.77 R1/R2 −0.26Sd/Td 0.86 |R7/R8| 12.34 TTL/ImgH 1.87 R8/R10 −0.85

Embodiment 4

FIG. 4A shows an image capturing optical lens system in accordance withthe fourth embodiment of the present invention, and FIG. 4B shows theaberration curves of the fourth embodiment of the present invention. Theimage capturing optical lens system of the fourth embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a first lens element 410 made of plastic with positive refractive powerhaving a convex object-side surface 411 and a convex image-side surface412, the object-side and image-side surfaces 411 and 412 thereof beingaspheric;

a second lens element 420 made of plastic with negative refractive powerhaving a concave object-side surface 421 and a concave image-sidesurface 422, the object-side and image-side surfaces 421 and 422 thereofbeing aspheric;

a third lens element 430 made of plastic with negative refractive powerhaving a concave object-side surface 431 and a concave image-sidesurface 432, the object-side and image-side surfaces 431 and 432 thereofbeing aspheric;

a fourth lens element 440 made of plastic with positive refractive powerhaving a convex object-side surface 441 and a convex image-side surface442, the object-side and image-side surfaces 441 and 442 thereof beingaspheric; and

a fifth lens element 450 made of plastic with negative refractive powerhaving a convex object-side surface 451 and a concave image-side surface452, the object-side and image-side surfaces 451 and 452 thereof beingaspheric, and at least one inflection point is formed on both theobject-side surface 451 and the image-side surface 452 thereof;

wherein an aperture stop 400 is disposed between an imaged object andthe first lens element 410;

the image capturing optical lens system further comprises an IR filter460 disposed between the image-side surface 452 of the fifth lenselement 450 and an image plane 471, and the IR filter 460 is made ofglass and has no influence on the focal length of the image capturingoptical lens system; the image capturing optical lens system furthercomprises an image sensor 470 provided on the image plane 471.

The detailed optical data of the fourth embodiment is shown in TABLE 9,and the aspheric surface data is shown in TABLE 10, wherein the units ofthe radius of curvature, the thickness and the focal length areexpressed in mm, and HFOV is half of the maximal field of view.

TABLE 9 (Embodiment 4) f = 3.27 mm, Fno = 2.80, HFOV = 34.4 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # length 0Object Plano Infinity 1 Ape. Stop Plano −0.030 2 Lens 1 1.975210 (ASP)0.403 Plastic 1.543 56.5 2.41 3 −3.605100 (ASP)   0.100 4 Lens 2−25.000000 (ASP)    0.263 Plastic 1.634 23.8 −7.78 5 6.171800 (ASP)0.478 6 Lens 3 −1.673900 (ASP)   0.250 Plastic 1.583 30.2 −2.36 78.187300 (ASP) 0.130 8 Lens 4 57.119700 (ASP)  0.775 Plastic 1.543 56.50.95 9 −0.518310 (ASP)   0.050 10 Lens 5 7.575800 (ASP) 0.271 Plastic1.543 56.5 −1.18 11 0.581950 (ASP) 0.600 12 IR-filter Plano 0.210 Glass1.517 64.2 — 13 Plano 0.812 14 Image Plano — * Reference wavelength isd-line 587.6 nm * Effective radius of surface 11 is 1.78 mm

TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 6 k = −1.72305E+01−3.08188E+01 3.90000E+01 −5.77705E+00 2.76316E+00 A4 = 1.30523E−01−4.38557E−01 −2.36879E−01 −9.07114E−02 −5.10127E−01 A6 = −6.42990E−014.18031E−01 1.20894E+00 4.76609E−01 −1.79761E−01 A8 = 1.23378E−01−1.19310E+00 −2.25052E+00 2.16790E−02 1.47074E+00 A10 = −3.48763E−011.66047E+00 3.09217E+00 −8.10168E−01 1.63251E+00 A12 = −8.94099E−01−1.97396E+00 1.41467E+00 3.44439E+00 −1.91051E+00 A14 = 1.04242E+001.49388E+00 −4.51671E+00 −1.14527E+00 −6.67521E−03 A16 = −2.15783E−021.39810E−06 1.37237E−06 1.37274E−06 Surface # 7 8 9 10 11 k =−3.89341E+01 1.50000E+00 −3.65923E+00 0.00000E+00 −6.44925E+00 A4 =−7.04396E−01 −5.02171E−01 −3.85576E−01 −5.31500E−02 −1.48232E−01 A6 =7.97928E−01 9.73442E−01 5.24647E−01 6.68137E−03 1.07032E−01 A8 =−6.88474E−01 −1.17720E+00 −4.30363E−01 2.96752E−02 −6.55926E−02 A10 =8.45855E−01 1.11279E+00 4.01176E−01 −4.37037E−02 2.57228E−02 A12 =−4.54501E−01 −7.12540E−01 −2.27882E−01 2.97681E−02 −5.54750E−03 A14 =4.48958E−02 2.22768E−01 3.40280E−02 −1.00171E−02 4.62779E−04 A16 =−2.15543E−02 6.48657E−03 1.27368E−03

The equation of the aspheric surface profiles of the fourth embodimenthas the same form as that of the first embodiment. Moreover, thedescription of the factors in the relations is as those set forth in thefirst embodiment, but the values of the relations of the fourthembodiment are listed in the following TABLE 11.

TABLE 11 (Embodiment 4) f 3.27 f3/f −0.72 Fno 2.80 f2/f3 3.30 HFOV 34.4f/f4 3.45 (V2 + V3)/V1 0.96 f/f5 −2.78 (T12 + T34)/T23 0.48 (|f4| +|f5|)/(|f2| + |f3|) 0.21 CT2/CT3 1.05 tan⁻¹(ImgH/f) 34.91 R1/R2 −0.55Sd/Td 0.99 |R7/R8| 110.20 TTL/ImgH 1.87 R8/R10 −0.89

Embodiment 5

FIG. 5A shows an image capturing optical lens system in accordance withthe fifth embodiment of the present invention, and FIG. 5B shows theaberration curves of the fifth embodiment of the present invention. Theimage capturing optical lens system of the fifth embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a first lens element 510 made of plastic with positive refractive powerhaving a convex object-side surface 511 and a convex image-side surface512, the object-side and image-side surfaces 511 and 512 thereof beingaspheric;

a second lens element 520 made of plastic with negative refractive powerhaving a convex object-side surface 521 and a concave image-side surface522, the object-side and image-side surfaces 521 and 522 thereof beingaspheric;

a third lens element 530 made of plastic with negative refractive powerhaving a concave object-side surface 531 and a convex image-side surface532, the object-side and image-side surfaces 531 and 532 thereof beingaspheric;

a fourth lens element 540 made of plastic with positive refractive powerhaving a concave object-side surface 541 and a convex image-side surface542, the object-side and image-side surfaces 541 and 542 thereof beingaspheric; and

a fifth lens element 550 made of plastic with negative refractive powerhaving a concave object-side surface 551 and a concave image-sidesurface 552, the object-side and image-side surfaces 551 and 552 thereofbeing aspheric, and at least one inflection point is formed on theimage-side surface 552 thereof;

wherein an aperture stop 500 is disposed between an imaged object andthe first lens element 510;

the image capturing optical lens system further comprises an IR filter560 disposed between the image-side surface 552 of the fifth lenselement 550 and an image plane 571, and the IR filter 560 is made ofglass and has no influence on the focal length of the image capturingoptical lens system; the image capturing optical lens system furthercomprises an image sensor 570 provided on the image plane 571.

The detailed optical data of the fifth embodiment is shown in TABLE 12,and the aspheric surface data is shown in TABLE 13, wherein the units ofthe radius of curvature, the thickness and the focal length areexpressed in mm, and HFOV is half of the maximal field of view.

TABLE 12 (Embodiment 5) f = 3.22 mm, Fno = 2.80, HFOV = 35.6 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # length 0Object Plano Infinity 1 Ape. Stop Plano −0.108 2 Lens 1   1.359740 (ASP)0.469 Plastic 1.535 56.3 2.51 3 −94.580500 (ASP)  0.052 4 Lens 264.930100 (ASP) 0.250 Plastic 1.634 23.8 −8.56 5   4.999500 (ASP) 0.4206 Lens 3 −2.838600 (ASP) 0.251 Plastic 1.634 23.8 −4.62 7 −95.522400(ASP)  0.078 8 Lens 4 −5.939000 (ASP) 0.758 Plastic 1.544 55.9 1.15 9−0.593110 (ASP) 0.189 10 Lens 5 −2.387010 (ASP) 0.283 Plastic 1.544 55.9−1.17 11   0.900160 (ASP) 0.600 12 IR-filter Plano 0.210 Glass 1.51764.2 — 13 Plano 0.454 14 Image Plano — * Reference wavelength is d-line587.6 nm

TABLE 13 Aspheric Coefficients Surface # 2 3 4 5 6 k = −7.08420E+003.71250E+01 9.59063E+01 4.07822E+01 1.25837E+01 A4 = 2.92689E−01−4.51557E−01 −3.84043E−01 −2.09728E−02 −2.51313E−01 A6 = −4.37362E−011.34542E+00 2.05106E+00 2.85486E−02 −5.70087E−01 A8 = 2.94062E−01−2.64066E+00 −4.05797E+00 1.57366E+00 3.88055E−01 A10 = −1.84393E−012.75330E+00 4.27879E+00 −3.78660E+00 2.46156E+00 A12 = −8.93290E−01−1.91786E+00 1.34808E+00 3.44998E+00 −1.89729E+00 A14 = 1.03635E+001.49388E+00 −4.51671E+00 −1.14527E+00 −6.67712E−03 A16 = −5.47096E−036.65262E−08 5.16376E−08 5.93850E−08 Surface # 7 8 9 10 11 k =−4.84375E+01 −1.16488E+01 −2.91635E+00 0.00000E+00 −8.95189E+00 A4 =−4.32233E−01 −4.76871E−01 −3.78268E−01 1.66625E−02 −1.70531E−01 A6 =3.71025E−01 1.02873E+00 4.78088E−01 9.83717E−03 1.32212E−01 A8 =−6.02643E−01 −1.22237E+00 −4.12211E−01 3.31263E−02 −7.28294E−02 A10 =1.01540E+00 1.08665E+00 4.18492E−01 −4.61935E−02 2.61277E−02 A12 =−5.13526E−01 −6.85338E−01 −2.21587E−01 2.93474E−02 −5.48836E−03 A14 =−1.16024E−02 2.46794E−01 2.91292E−02 −9.79540E−03 4.87703E−04 A16 =−5.20320E−02 4.15633E−03 1.34119E−03

The equation of the aspheric surface profiles of the fifth embodimenthas the same form as that of the first embodiment. Moreover, thedescription of the factors in the relations is as those set forth in thefirst embodiment, but the values of the relations of the fifthembodiment are listed in the following TABLE 14.

TABLE 14 (Embodiment 5) f 3.22 f3/f −1.44 Fno 2.80 f2/f3 1.85 HFOV 35.6f/f4 2.79 (V2 + V3)/V1 0.85 f/f5 −2.76 (T12 + T34)/T23 0.31 (|f4| +|f5|)/(|f2| + |f3|) 0.18 CT2/CT3 1.00 tan⁻¹(ImgH/f) 35.36 R1/R2 −0.01Sd/Td 0.96 |R7/R8| 10.01 TTL/ImgH 1.73 R8/R10 −0.66

Embodiment 6

FIG. 6A shows an image capturing optical lens system in accordance withthe sixth embodiment of the present invention, and FIG. 6B shows theaberration curves of the sixth embodiment of the present invention. Theimage capturing optical lens system of the sixth embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a first lens element 610 made of plastic with positive refractive powerhaving a convex object-side surface 611 and a convex image-side surface612, the object-side and image-side surfaces 611 and 612 thereof beingaspheric;

a second lens element 620 made of plastic with negative refractive powerhaving a convex object-side surface 621 and a concave image-side surface622, the object-side and image-side surfaces 621 and 622 thereof beingaspheric;

a third lens element 630 made of plastic with negative refractive powerhaving a concave object-side surface 631 and a concave image-sidesurface 632, the object-side and image-side surfaces 631 and 632 thereofbeing aspheric;

a fourth lens element 640 made of plastic with positive refractive powerhaving a concave object-side surface 641 and a convex image-side surface642, the object-side and image-side surfaces 641 and 642 thereof beingaspheric; and

a fifth lens element 650 made of plastic with negative refractive powerhaving a concave object-side surface 651 and a concave image-sidesurface 652, the object-side and image-side surfaces 651 and 652 thereofbeing aspheric, and at least one inflection point is formed on theimage-side surface 652 thereof;

wherein an aperture stop 600 is disposed between the first lens element610 and the second lens element 620;

the image capturing optical lens system further comprises an IR filter660 disposed between the image-side surface 652 of the fifth lenselement 650 and an image plane 671, and the IR filter 660 is made ofglass and has no influence on the focal length of the image capturingoptical lens system; the image capturing optical lens system furthercomprises an image sensor 670 provided on the image plane 671.

The detailed optical data of the sixth embodiment is shown in TABLE 15,and the aspheric surface data is shown in TABLE 16, wherein the units ofthe radius of curvature, the thickness and the focal length areexpressed in mm, and HFOV is half of the maximal field of view.

TABLE 15 (Embodiment 6) f = 3.19 mm, Fno = 2.60, HFOV = 35.4 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # length 0Object Plano Infinity 1 Lens 1 1.432950 (ASP) 0.528 Plastic 1.544 55.92.57 2 −52.705700 (ASP)    0.015 3 Ape. Stop Plano 0.045 4 Lens 27.061600 (ASP) 0.250 Plastic 1.640 23.3 −6.17 5 2.498260 (ASP) 0.431 6Lens 3 −4.239000 (ASP)   0.250 Plastic 1.583 30.2 −4.58 7 7.403700 (ASP)0.070 8 Lens 4 −97.651300 (ASP)    0.856 Plastic 1.544 55.9 1.09 9−0.589200 (ASP)   0.109 10 Lens 5 −2.630830 (ASP)   0.359 Plastic 1.53556.3 −1.17 11 0.862560 (ASP) 0.550 12 IR-filter Plano 0.210 Glass 1.51764.2 — 13 Plano 0.475 14 Image Plano — * Reference wavelength is d-line587.6 nm

TABLE 16 Aspheric Coefficients Surface # 1 2 4 5 6 k = −7.65156E+00−1.00000E+00 −1.00000E+00 −5.65143E−01 1.20307E+01 A4 = 2.97823E−01−3.66896E−01 −4.25115E−01 −9.71402E−02 −3.07523E−01 A6 = −4.16867E−011.25277E+00 1.89048E+00 2.36557E−01 −6.22309E−01 A8 = 3.48538E−01−2.70328E+00 −3.84059E+00 1.40692E+00 4.65506E−01 A10 = 1.95057E−013.37099E+00 4.36247E+00 −4.20303E+00 2.40956E+00 A12 = −1.21037E+00−3.00849E+00 3.15948E−01 4.79622E+00 −2.51988E+00 A14 = 1.02310E+002.67001E+00 −6.95011E+00 −4.58206E−01 6.83238E−01 A16 = −1.19755E−01−1.08741E+00 6.85884E+00 −2.73780E−01 Surface # 7 8 9 10 11 k =−1.86198E+01 −1.00000E+00 −3.17859E+00 −1.00000E+00 −9.19941E+00 A4 =−4.86429E−01 −4.62613E−01 −3.52424E−01 2.17224E−02 −1.49123E−01 A6 =3.93367E−01 9.97127E−01 4.74387E−01 6.80924E−03 1.15992E−01 A8 =−5.84639E−01 −1.21777E+00 −4.17172E−01 3.23102E−02 −6.89489E−02 A10 =1.00060E+00 1.10602E+00 4.17674E−01 −4.61157E−02 2.59581E−02 A12 =−5.58356E−01 −6.74293E−01 −2.22559E−01 2.96884E−02 −5.37592E−03 A14 =4.95025E−02 2.26875E−01 2.96937E−02 −9.79474E−03 4.53625E−04 A16 =−4.98836E−02 3.66428E−03 1.27148E−03

The equation of the aspheric surface profiles of the sixth embodimenthas the same form as that of the first embodiment. Moreover, thedescription of the factors in the relations is as those set forth in thefirst embodiment, but the values of the relations of the sixthembodiment are listed in the following TABLE 17.

TABLE 17 (Embodiment 6) f 3.19 f3/f −1.44 Fno 2.60 f2/f3 1.35 HFOV 35.4f/f4 2.94 (V2 + V3)/V1 0.96 f/f5 −2.72 (T12 + T34)/T23 0.30 (|f4| +|f5|)/(|f2| + |f3|) 0.21 CT2/CT3 1.00 tan⁻¹(ImgH/f) 35.61 R1/R2 −0.03Sd/Td 0.81 |R7/R8| 165.74 TTL/ImgH 1.78 R8/R10 −0.68

Embodiment 7

FIG. 7A shows an image capturing optical lens system in accordance withthe seventh embodiment of the present invention, and FIG. 7B shows theaberration curves of the seventh embodiment of the present invention.The image capturing optical lens system of the seventh embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a first lens element 710 made of plastic with positive refractive powerhaving a convex object-side surface 711 and a concave image-side surface712, the object-side and image-side surfaces 711 and 712 thereof beingaspheric;

a second lens element 720 made of plastic with negative refractive powerhaving a convex object-side surface 721 and a concave image-side surface722, the object-side and image-side surfaces 721 and 722 thereof beingaspheric;

a third lens element 730 made of plastic with negative refractive powerhaving a concave object-side surface 731 and a concave image-sidesurface 732, the object-side and image-side surfaces 731 and 732 thereofbeing aspheric;

a fourth lens element 740 made of plastic with positive refractive powerhaving a convex object-side surface 741 and a convex image-side surface742, the object-side and image-side surfaces 741 and 742 thereof beingaspheric; and

a fifth lens element 750 made of plastic with negative refractive powerhaving a concave object-side surface 751 and a concave image-sidesurface 752, the object-side and image-side surfaces 751 and 752 thereofbeing aspheric, and at least one inflection point is formed on theimage-side surface 752 thereof;

wherein an aperture stop 700 is disposed between the first lens element710 and the second lens element 720;

the image capturing optical lens system further comprises an IR filter760 disposed between the image-side surface 752 of the fifth lenselement 750 and an image plane 771, and the IR filter 760 is made ofglass and has no influence on the focal length of the image capturingoptical lens system; the image capturing optical lens system furthercomprises an image sensor 770 provided on the image plane 771.

The detailed optical data of the seventh embodiment is shown in TABLE18, and the aspheric surface data is shown in TABLE 19, wherein theunits of the radius of curvature, the thickness and the focal length areexpressed in mm, and HFOV is half of the maximal field of view.

TABLE 18 (Embodiment 7) f = 3.11 mm, Fno = 2.80, HFOV = 36.2 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # length 0Object Plano Infinity 1 Lens 1 1.412720 (ASP) 0.457 Plastic 1.544 55.92.71 2 29.311100 (ASP)  0.034 3 Ape. Stop Plano 0.026 4 Lens 2 3.176400(ASP) 0.251 Plastic 1.640 23.3 −6.27 5 1.718210 (ASP) 0.428 6 Lens 3−3.712900 (ASP)   0.250 Plastic 1.633 23.4 −4.62 7 14.145700 (ASP) 0.070 8 Lens 4 9.469900 (ASP) 0.928 Plastic 1.544 55.9 1.12 9 −0.630790(ASP)   0.196 10 Lens 5 −2.008810 (ASP)   0.267 Plastic 1.535 56.3 −1.2011 0.982330 (ASP) 0.500 12 IR-filter Plano 0.210 Glass 1.517 64.2 — 13Plano 0.442 14 Image Plano — * Reference wavelength is d-line 587.6 nm

TABLE 19 Aspheric Coefficients Surface # 1 2 4 5 6 k = −7.68757E+00−1.00000E+00 −1.00000E+00 −1.94488E+00 1.65886E+01 A4 = 3.15647E−01−3.32685E−01 −4.29022E−01 −1.24510E−01 −3.02003E−01 A6 = −4.21722E−011.08713E+00 1.64055E+00 3.63775E−01 −5.50238E−01 A8 = 3.51380E−01−2.51829E+00 −3.58456E+00 9.86373E−01 7.02581E−01 A10 = 1.44995E−013.27843E+00 4.44987E+00 −3.97732E+00 1.82041E+00 A12 = −1.21066E+00−3.00849E+00 3.15951E−01 4.79622E+00 −2.51988E+00 A14 = 1.02310E+002.67001E+00 −6.95011E+00 −4.58203E−01 6.83241E−01 A16 = −1.19752E−01−1.08741E+00 6.85884E+00 −2.73778E−01 Surface # 7 8 9 10 11 k =−1.00000E+00 −1.00000E+00 −3.15705E+00 −1.00000E+00 −1.06468E+01 A4 =−5.11159E−01 −4.47338E−01 −3.23393E−01 −4.19233E−04 −1.54132E−01 A6 =4.92177E−01 9.85229E−01 4.36546E−01 1.69346E−02 1.15191E−01 A8 =−6.44266E−01 −1.22259E+00 −4.22500E−01 3.28201E−02 −6.86652E−02 A10 =9.26992E−01 1.09616E+00 4.22465E−01 −4.63797E−02 2.59555E−02 A12 =−5.68541E−01 −6.77275E−01 −2.19041E−01 2.95397E−02 −5.37428E−03 A14 =1.09519E−01 2.31537E−01 3.13952E−02 −9.81841E−03 4.59560E−04 A16 =−3.06720E−02 3.95393E−03 1.29579E−03

The equation of the aspheric surface profiles of the seventh embodimenthas the same form as that of the first embodiment. Moreover, thedescription of the factors in the relations is as those set forth in thefirst embodiment, but the values of the relations of the seventhembodiment are listed in the following TABLE 20.

TABLE 20 (Embodiment 7) f 3.11 f3/f −1.49 Fno 2.80 f2/f3 1.36 HFOV 36.2f/f4 2.77 (V2 + V3)/V1 0.84 f/f5 −2.60 (T12 + T34)/T23 0.30 (|f4| +|f5|)/(|f2| + |f3|) 0.21 CT2/CT3 1.00 tan⁻¹(ImgH/f) 36.31 R1/R2 0.05Sd/Td 0.83 |R7/R8| 15.01 TTL/ImgH 1.75 R8/R10 −0.64

Embodiment 8

FIG. 8A shows an image capturing optical lens system in accordance withthe eighth embodiment of the present invention, and FIG. 8B shows theaberration curves of the eighth embodiment of the present invention. Theimage capturing optical lens system of the eighth embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a first lens element 810 made of plastic with positive refractive powerhaving a convex object-side surface 811 and a convex image-side surface812, the object-side and image-side surfaces 811 and 812 thereof beingaspheric;

a second lens element 820 made of plastic with negative refractive powerhaving a concave object-side surface 821 and a concave image-sidesurface 822, the object-side and image-side surfaces 821 and 822 thereofbeing aspheric;

a third lens element 830 made of plastic with negative refractive powerhaving a concave object-side surface 831 and a convex image-side surface832, the object-side and image-side surfaces 831 and 832 thereof beingaspheric;

a fourth lens element 840 made of plastic with positive refractive powerhaving a concave object-side surface 841 and a convex image-side surface842, the object-side and image-side surfaces 841 and 842 thereof beingaspheric; and

a fifth lens element 850 made of plastic with negative refractive powerhaving a concave object-side surface 851 and a concave image-sidesurface 852, the object-side and image-side surfaces 851 and 852 thereofbeing aspheric, and at least one inflection point is formed on theimage-side surface 852 thereof;

wherein an aperture stop 800 is disposed between the first lens element810 and the second lens element 820;

the image capturing optical lens system further comprises an IR filter860 disposed between the image-side surface 852 of the fifth lenselement 850 and an image plane 871, and the IR filter 860 is made ofglass and has no influence on the focal length of the image capturingoptical lens system; the image capturing optical lens system furthercomprises an image sensor 870 provided on the image plane 871.

The detailed optical data of the eighth embodiment is shown in TABLE 21,and the aspheric surface data is shown in TABLE 22, wherein the units ofthe radius of curvature, the thickness and the focal length areexpressed in mm, and HFOV is half of the maximal field of view.

TABLE 21 (Embodiment 8) f = 3.25 mm, Fno = 2.80, HFOV = 35.5 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # length 0Object Plano Infinity 1 Lens 1   1.400190 (ASP) 0.437 Plastic 1.544 55.92.36 2 −13.747400 (ASP)  0.007 3 Ape. Stop Plano 0.073 4 Lens 2−10.752700 (ASP)  0.250 Plastic 1.634 23.8 −6.88 5   7.399400 (ASP)0.443 6 Lens 3 −3.178700 (ASP) 0.282 Plastic 1.634 23.8 −5.25 7−73.218200 (ASP)  0.080 8 Lens 4 −4.265400 (ASP) 0.779 Plastic 1.54455.9 1.20 9 −0.603010 (ASP) 0.123 10 Lens 5 −3.808600 (ASP) 0.365Plastic 1.544 55.9 −1.24 11   0.849330 (ASP) 0.500 12 IR-filter Plano0.210 Glass 1.517 64.2 — 13 Plano 0.563 14 Image Plano — * Referencewavelength is d-line 587.6 nm

TABLE 22 Aspheric Coefficients Surface # 1 2 4 5 6 k = −7.70629E+00−3.90000E+01 −5.90000E+01 3.36333E+01 1.53650E+01 A4 = 2.70540E−01−3.79137E−01 −2.98199E−01 −7.01875E−02 −4.10122E−01 A6 = −5.03314E−011.06239E+00 1.86457E+00 2.36102E−01 −4.33309E−01 A8 = 3.74442E−01−2.39950E+00 −4.66022E+00 1.15465E+00 3.10406E−01 A10 = −2.23610E−013.03485E+00 6.09959E+00 −6.10284E+00 1.08105E+00 A12 = −9.63234E−01−3.22895E+00 1.32704E+01 3.93347E+00 −2.77856E+00 A14 = 8.34005E−015.59443E+00 −7.85519E+01 1.05440E+01 2.08785E−01 A16 = 8.68585E−01−2.61361E+00 1.14018E+02 −9.44151E+00 Surface # 7 8 9 10 11 k =5.00000E+01 −4.90000E+01 −3.13337E+00 0.00000E+00 −8.14347E+00 A4 =−4.87278E−01 −4.78857E−01 −3.43834E−01 2.36117E−04 −1.48647E−01 A6 =4.21532E−01 1.02670E+00 4.87340E−01 1.56983E−02 1.19926E−01 A8 =−6.33554E−01 −1.19706E+00 −4.17127E−01 3.19768E−02 −7.04255E−02 A10 =9.62464E−01 1.10438E+00 4.12092E−01 −4.59248E−02 2.64255E−02 A12 =−5.19087E−01 −6.88343E−01 −2.25199E−01 2.91755E−02 −5.49264E−03 A14 =8.13824E−02 2.25676E−01 2.70756E−02 −9.79432E−03 4.67668E−04 A16 =−7.57853E−02 3.92248E−03 1.31929E−03

The equation of the aspheric surface profiles of the eighth embodimenthas the same form as that of the first embodiment. Moreover, thedescription of the factors in the relations is as those set forth in thefirst embodiment, but the values of the relations of the eighthembodiment are listed in the following TABLE 23.

TABLE 23 (Embodiment 8) f 3.25 f3/f −1.62 Fno 2.80 f2/f3 1.31 HFOV 35.5f/f4 2.71 (V2 + V3)/V1 0.85 f/f5 −2.62 (T12 + T34)/T23 0.36 (|f4| +|f5|)/(|f2| + |f3|) 0.20 CT2/CT3 0.89 tan⁻¹(ImgH/f) 35.11 R1/R2 −0.10Sd/Td 0.84 |R7/R8| 7.07 TTL/ImgH 1.77 R8/R10 −0.71

It is to be noted that TABLES 1-23 show different data of the differentembodiments, however, the data of the different embodiments are obtainedfrom experiments. Therefore, any image capturing optical lens system ofthe same structure is considered to be within the scope of the presentinvention even if it uses different data. The embodiments depicted aboveand the appended drawings are exemplary and are not intended to limitthe scope of the present invention.

1. An image capturing optical lens system comprising, in order from anobject side to an image side: a first lens element with positiverefractive power having a convex object-side surface; a second lenselement with negative refractive power; a third lens element withnegative refractive power having at least one of the object-side andimage-side surfaces thereof being aspheric; a fourth lens element havingat least one of the object-side and image-side surfaces thereof beingaspheric; and a fifth lens element having a concave image-side surface,both the object-side and image-side surfaces thereof being aspheric, atleast one inflection point is formed on at least one of the object-sideand image-side surfaces thereof, and the fifth lens element is made ofplastic; wherein a curvature radius of the object-side surface of thefourth lens element is R7, a curvature radius of the image-side surfaceof the fourth lens element is R8, a focal length of the second lenselement is f2, a focal length of the third lens element is f3, a focallength of the image capturing optical lens system is f, and they satisfythe following relations:4.0<|R7/R8|;0.8<f2/f3<10.0; and−2.0<f3/f<−0.67.
 2. The image capturing optical lens system according toclaim 1, wherein the fourth lens element has a convex image-sidesurface, and the fifth lens element has negative refractive power. 3.The image capturing optical lens system according to claim 2, whereinthe fourth lens element has positive refractive power, a curvatureradius of the object-side surface of the first lens element is R1, acurvature radius of the image-side surface of the first lens element isR2, and they satisfy the following relation:−0.8<R1/R2<0.8.
 4. The image capturing optical lens system according toclaim 3, wherein a focal length of the fourth lens element is f4, afocal length of the fifth lens element is f5, a focal length of thesecond lens element is f2, a focal length of the third lens element isf3, and they satisfy the following relation:0.05<(|f4|+|f5|)/(|f2|+|f3|)<0.5.
 5. The image capturing optical lenssystem according to claim 4, wherein the second lens element has aconcave image-side surface, the third lens element has a concaveobject-side surface and the fifth lens element has a concave object-sidesurface.
 6. The image capturing optical lens system according to claim5, wherein a curvature radius of the object-side surface of the secondlens element is R3, a curvature radius of the image-side surface of thesecond lens element is R4, a curvature radius of the object-side surfaceof the third lens element is R5, a curvature radius of the image-sidesurface of the third lens element is R6, and they satisfy the followingrelations:|R3|>|R4|; and|R5|<|R6|.
 7. The image capturing optical lens system according to claim5, wherein the curvature radius of the object-side surface of the fourthlens element is R7, the curvature radius of the image-side surface ofthe fourth lens element is R8, and they satisfy the following relation:7.0<|R7/R8|.
 8. The image capturing optical lens system according toclaim 4, wherein the curvature radius of the object-side surface of thefirst lens element is R1, the curvature radius of the image-side surfaceof the first lens element is R2, and they satisfy the followingrelation:−0.3<R1/R2<0.2.
 9. The image capturing optical lens system according toclaim 8, wherein the focal length of the third lens element is f3, thefocal length of the image capturing optical lens system is f, and theysatisfy the following relation:−1.7<f3/f<−0.8.
 10. The image capturing optical lens system according toclaim 8, wherein an axial distance between the first lens element andthe second lens element is T12, an axial distance between the third lenselement and the fourth lens element is T34, an axial distance betweenthe second lens element and the third lens element is T23, and theysatisfy the following relation:0.1<(T12+T34)/T23<0.5.
 11. The image capturing optical lens systemaccording to claim 8, wherein the focal length of the fourth lenselement is f4, the focal length of the fifth lens element is f5, thefocal length of the second lens element is f2, the focal length of thethird lens element is f3, and they satisfy the following relation:0.1<(|f4|+|f5|)/(|f2|+|f3|)<0.3.
 12. The image capturing optical lenssystem according to claim 2, wherein an Abbe number of the first lenselement is V1, an Abbe number of the second lens element is V2, an Abbenumber of the third lens element is V3, and they satisfy the followingrelation:(V2+V3)/V1<1.0.
 13. The image capturing optical lens system according toclaim 12, wherein the curvature radius of the image-side surface of thefourth lens element is R8, a curvature radius of the image-side surfaceof the fifth lens element is R10, and they satisfy the followingrelation:−1.0<R8/R10<−0.5.
 14. The image capturing optical lens system accordingto claim 13, wherein the focal length of the image capturing opticallens system is f, a focal length of the fourth lens element is f4, afocal length of the fifth lens element is f5, and they satisfy thefollowing relations:f/f4>2.0; andf/f5<−2.0.
 15. The image capturing optical lens system according toclaim 13, wherein the focal length of the second lens element is f2, thefocal length of the third lens element is f3, and they satisfy thefollowing relation:1.2<f2/f3<4.5.
 16. The image capturing optical lens system according toclaim 3, further comprises a stop, an axial distance between the stopand the image-side surface of the fifth lens element is Sd, an axialdistance between the object-side surface of the first lens element andthe image-side surface of the fifth lens element is Td, and they satisfythe following relation:0.75<Sd/Td<1.1.
 17. The image capturing optical lens system according toclaim 16, wherein a central thickness of the second lens element is CT2,a central thickness of the third lens element is CT3, and they satisfythe following relation:0.7<CT2/CT3<1.3.
 18. The image capturing optical lens system accordingto claim 17, further comprises an image sensor provided on an imageplane, half of a diagonal length of an effective photosensitive area ofthe image sensor is ImgH, the focal length of the image capturingoptical lens system is f, and they satisfy the following relation:tan⁻¹(ImgH/f)>34.
 19. The image capturing optical lens system accordingto claim 3, further comprises an image sensor provided on an imageplane, an axial distance between the object-side surface of the firstlens element and the image plane is TTL, half of a diagonal length of aneffective photosensitive area of the image sensor is ImgH, and theysatisfy the following relation:TTL/ImgH<2.0.